diff options
Diffstat (limited to 'crypto/heimdal/lib/gssapi/ntlm/crypto.c')
| -rw-r--r-- | crypto/heimdal/lib/gssapi/ntlm/crypto.c | 595 |
1 files changed, 0 insertions, 595 deletions
diff --git a/crypto/heimdal/lib/gssapi/ntlm/crypto.c b/crypto/heimdal/lib/gssapi/ntlm/crypto.c deleted file mode 100644 index b05246c..0000000 --- a/crypto/heimdal/lib/gssapi/ntlm/crypto.c +++ /dev/null @@ -1,595 +0,0 @@ -/* - * Copyright (c) 2006 Kungliga Tekniska Högskolan - * (Royal Institute of Technology, Stockholm, Sweden). - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * 3. Neither the name of the Institute nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -#include "ntlm/ntlm.h" - -RCSID("$Id: crypto.c 19535 2006-12-28 14:49:01Z lha $"); - -uint32_t -_krb5_crc_update (const char *p, size_t len, uint32_t res); -void -_krb5_crc_init_table(void); - -/* - * - */ - -static void -encode_le_uint32(uint32_t n, unsigned char *p) -{ - p[0] = (n >> 0) & 0xFF; - p[1] = (n >> 8) & 0xFF; - p[2] = (n >> 16) & 0xFF; - p[3] = (n >> 24) & 0xFF; -} - - -static void -decode_le_uint32(const void *ptr, uint32_t *n) -{ - const unsigned char *p = ptr; - *n = (p[0] << 0) | (p[1] << 8) | (p[2] << 16) | (p[3] << 24); -} - -/* - * - */ - -const char a2i_signmagic[] = - "session key to server-to-client signing key magic constant"; -const char a2i_sealmagic[] = - "session key to server-to-client sealing key magic constant"; -const char i2a_signmagic[] = - "session key to client-to-server signing key magic constant"; -const char i2a_sealmagic[] = - "session key to client-to-server sealing key magic constant"; - - -void -_gss_ntlm_set_key(struct ntlmv2_key *key, int acceptor, int sealsign, - unsigned char *data, size_t len) -{ - unsigned char out[16]; - MD5_CTX ctx; - const char *signmagic; - const char *sealmagic; - - if (acceptor) { - signmagic = a2i_signmagic; - sealmagic = a2i_sealmagic; - } else { - signmagic = i2a_signmagic; - sealmagic = i2a_sealmagic; - } - - key->seq = 0; - - MD5_Init(&ctx); - MD5_Update(&ctx, data, len); - MD5_Update(&ctx, signmagic, strlen(signmagic) + 1); - MD5_Final(key->signkey, &ctx); - - MD5_Init(&ctx); - MD5_Update(&ctx, data, len); - MD5_Update(&ctx, sealmagic, strlen(sealmagic) + 1); - MD5_Final(out, &ctx); - - RC4_set_key(&key->sealkey, 16, out); - if (sealsign) - key->signsealkey = &key->sealkey; -} - -/* - * - */ - -static OM_uint32 -v1_sign_message(gss_buffer_t in, - RC4_KEY *signkey, - uint32_t seq, - unsigned char out[16]) -{ - unsigned char sigature[12]; - uint32_t crc; - - _krb5_crc_init_table(); - crc = _krb5_crc_update(in->value, in->length, 0); - - encode_le_uint32(0, &sigature[0]); - encode_le_uint32(crc, &sigature[4]); - encode_le_uint32(seq, &sigature[8]); - - encode_le_uint32(1, out); /* version */ - RC4(signkey, sizeof(sigature), sigature, out + 4); - - if (RAND_bytes(out + 4, 4) != 1) - return GSS_S_UNAVAILABLE; - - return 0; -} - - -static OM_uint32 -v2_sign_message(gss_buffer_t in, - unsigned char signkey[16], - RC4_KEY *sealkey, - uint32_t seq, - unsigned char out[16]) -{ - unsigned char hmac[16]; - unsigned int hmaclen; - HMAC_CTX c; - - HMAC_CTX_init(&c); - HMAC_Init_ex(&c, signkey, 16, EVP_md5(), NULL); - - encode_le_uint32(seq, hmac); - HMAC_Update(&c, hmac, 4); - HMAC_Update(&c, in->value, in->length); - HMAC_Final(&c, hmac, &hmaclen); - HMAC_CTX_cleanup(&c); - - encode_le_uint32(1, &out[0]); - if (sealkey) - RC4(sealkey, 8, hmac, &out[4]); - else - memcpy(&out[4], hmac, 8); - - memset(&out[12], 0, 4); - - return GSS_S_COMPLETE; -} - -static OM_uint32 -v2_verify_message(gss_buffer_t in, - unsigned char signkey[16], - RC4_KEY *sealkey, - uint32_t seq, - const unsigned char checksum[16]) -{ - OM_uint32 ret; - unsigned char out[16]; - - ret = v2_sign_message(in, signkey, sealkey, seq, out); - if (ret) - return ret; - - if (memcmp(checksum, out, 16) != 0) - return GSS_S_BAD_MIC; - - return GSS_S_COMPLETE; -} - -static OM_uint32 -v2_seal_message(const gss_buffer_t in, - unsigned char signkey[16], - uint32_t seq, - RC4_KEY *sealkey, - gss_buffer_t out) -{ - unsigned char *p; - OM_uint32 ret; - - if (in->length + 16 < in->length) - return EINVAL; - - p = malloc(in->length + 16); - if (p == NULL) - return ENOMEM; - - RC4(sealkey, in->length, in->value, p); - - ret = v2_sign_message(in, signkey, sealkey, seq, &p[in->length]); - if (ret) { - free(p); - return ret; - } - - out->value = p; - out->length = in->length + 16; - - return 0; -} - -static OM_uint32 -v2_unseal_message(gss_buffer_t in, - unsigned char signkey[16], - uint32_t seq, - RC4_KEY *sealkey, - gss_buffer_t out) -{ - OM_uint32 ret; - - if (in->length < 16) - return GSS_S_BAD_MIC; - - out->length = in->length - 16; - out->value = malloc(out->length); - if (out->value == NULL) - return GSS_S_BAD_MIC; - - RC4(sealkey, out->length, in->value, out->value); - - ret = v2_verify_message(out, signkey, sealkey, seq, - ((const unsigned char *)in->value) + out->length); - if (ret) { - OM_uint32 junk; - gss_release_buffer(&junk, out); - } - return ret; -} - -/* - * - */ - -#define CTX_FLAGS_ISSET(_ctx,_flags) \ - (((_ctx)->flags & (_flags)) == (_flags)) - -/* - * - */ - -OM_uint32 _gss_ntlm_get_mic - (OM_uint32 * minor_status, - const gss_ctx_id_t context_handle, - gss_qop_t qop_req, - const gss_buffer_t message_buffer, - gss_buffer_t message_token - ) -{ - ntlm_ctx ctx = (ntlm_ctx)context_handle; - OM_uint32 junk; - - if (minor_status) - *minor_status = 0; - if (message_token) { - message_token->length = 0; - message_token->value = NULL; - } - - message_token->value = malloc(16); - message_token->length = 16; - if (message_token->value == NULL) { - *minor_status = ENOMEM; - return GSS_S_FAILURE; - } - - if (CTX_FLAGS_ISSET(ctx, NTLM_NEG_SIGN|NTLM_NEG_NTLM2_SESSION)) { - OM_uint32 ret; - - if ((ctx->status & STATUS_SESSIONKEY) == 0) { - gss_release_buffer(&junk, message_token); - return GSS_S_UNAVAILABLE; - } - - ret = v2_sign_message(message_buffer, - ctx->u.v2.send.signkey, - ctx->u.v2.send.signsealkey, - ctx->u.v2.send.seq++, - message_token->value); - if (ret) - gss_release_buffer(&junk, message_token); - return ret; - - } else if (CTX_FLAGS_ISSET(ctx, NTLM_NEG_SIGN)) { - OM_uint32 ret; - - if ((ctx->status & STATUS_SESSIONKEY) == 0) { - gss_release_buffer(&junk, message_token); - return GSS_S_UNAVAILABLE; - } - - ret = v1_sign_message(message_buffer, - &ctx->u.v1.crypto_send.key, - ctx->u.v1.crypto_send.seq++, - message_token->value); - if (ret) - gss_release_buffer(&junk, message_token); - return ret; - - } else if (CTX_FLAGS_ISSET(ctx, NTLM_NEG_ALWAYS_SIGN)) { - unsigned char *sigature; - - sigature = message_token->value; - - encode_le_uint32(1, &sigature[0]); /* version */ - encode_le_uint32(0, &sigature[4]); - encode_le_uint32(0, &sigature[8]); - encode_le_uint32(0, &sigature[12]); - - return GSS_S_COMPLETE; - } - gss_release_buffer(&junk, message_token); - - return GSS_S_UNAVAILABLE; -} - -/* - * - */ - -OM_uint32 -_gss_ntlm_verify_mic - (OM_uint32 * minor_status, - const gss_ctx_id_t context_handle, - const gss_buffer_t message_buffer, - const gss_buffer_t token_buffer, - gss_qop_t * qop_state - ) -{ - ntlm_ctx ctx = (ntlm_ctx)context_handle; - - if (qop_state != NULL) - *qop_state = GSS_C_QOP_DEFAULT; - *minor_status = 0; - - if (token_buffer->length != 16) - return GSS_S_BAD_MIC; - - if (CTX_FLAGS_ISSET(ctx, NTLM_NEG_SIGN|NTLM_NEG_NTLM2_SESSION)) { - OM_uint32 ret; - - if ((ctx->status & STATUS_SESSIONKEY) == 0) - return GSS_S_UNAVAILABLE; - - ret = v2_verify_message(message_buffer, - ctx->u.v2.recv.signkey, - ctx->u.v2.recv.signsealkey, - ctx->u.v2.recv.seq++, - token_buffer->value); - if (ret) - return ret; - - return GSS_S_COMPLETE; - } else if (CTX_FLAGS_ISSET(ctx, NTLM_NEG_SIGN)) { - - unsigned char sigature[12]; - uint32_t crc, num; - - if ((ctx->status & STATUS_SESSIONKEY) == 0) - return GSS_S_UNAVAILABLE; - - decode_le_uint32(token_buffer->value, &num); - if (num != 1) - return GSS_S_BAD_MIC; - - RC4(&ctx->u.v1.crypto_recv.key, sizeof(sigature), - ((unsigned char *)token_buffer->value) + 4, sigature); - - _krb5_crc_init_table(); - crc = _krb5_crc_update(message_buffer->value, - message_buffer->length, 0); - /* skip first 4 bytes in the encrypted checksum */ - decode_le_uint32(&sigature[4], &num); - if (num != crc) - return GSS_S_BAD_MIC; - decode_le_uint32(&sigature[8], &num); - if (ctx->u.v1.crypto_recv.seq != num) - return GSS_S_BAD_MIC; - ctx->u.v1.crypto_recv.seq++; - - return GSS_S_COMPLETE; - } else if (ctx->flags & NTLM_NEG_ALWAYS_SIGN) { - uint32_t num; - unsigned char *p; - - p = (unsigned char*)(token_buffer->value); - - decode_le_uint32(&p[0], &num); /* version */ - if (num != 1) return GSS_S_BAD_MIC; - decode_le_uint32(&p[4], &num); - if (num != 0) return GSS_S_BAD_MIC; - decode_le_uint32(&p[8], &num); - if (num != 0) return GSS_S_BAD_MIC; - decode_le_uint32(&p[12], &num); - if (num != 0) return GSS_S_BAD_MIC; - - return GSS_S_COMPLETE; - } - - return GSS_S_UNAVAILABLE; -} - -/* - * - */ - -OM_uint32 -_gss_ntlm_wrap_size_limit ( - OM_uint32 * minor_status, - const gss_ctx_id_t context_handle, - int conf_req_flag, - gss_qop_t qop_req, - OM_uint32 req_output_size, - OM_uint32 * max_input_size - ) -{ - ntlm_ctx ctx = (ntlm_ctx)context_handle; - - *minor_status = 0; - - if(ctx->flags & NTLM_NEG_SEAL) { - - if (req_output_size < 16) - *max_input_size = 0; - else - *max_input_size = req_output_size - 16; - - return GSS_S_COMPLETE; - } - - return GSS_S_UNAVAILABLE; -} - -/* - * - */ - -OM_uint32 _gss_ntlm_wrap -(OM_uint32 * minor_status, - const gss_ctx_id_t context_handle, - int conf_req_flag, - gss_qop_t qop_req, - const gss_buffer_t input_message_buffer, - int * conf_state, - gss_buffer_t output_message_buffer - ) -{ - ntlm_ctx ctx = (ntlm_ctx)context_handle; - OM_uint32 ret; - - if (minor_status) - *minor_status = 0; - if (conf_state) - *conf_state = 0; - if (output_message_buffer == GSS_C_NO_BUFFER) - return GSS_S_FAILURE; - - - if (CTX_FLAGS_ISSET(ctx, NTLM_NEG_SEAL|NTLM_NEG_NTLM2_SESSION)) { - - return v2_seal_message(input_message_buffer, - ctx->u.v2.send.signkey, - ctx->u.v2.send.seq++, - &ctx->u.v2.send.sealkey, - output_message_buffer); - - } else if (CTX_FLAGS_ISSET(ctx, NTLM_NEG_SEAL)) { - gss_buffer_desc trailer; - OM_uint32 junk; - - output_message_buffer->length = input_message_buffer->length + 16; - output_message_buffer->value = malloc(output_message_buffer->length); - if (output_message_buffer->value == NULL) { - output_message_buffer->length = 0; - return GSS_S_FAILURE; - } - - - RC4(&ctx->u.v1.crypto_send.key, input_message_buffer->length, - input_message_buffer->value, output_message_buffer->value); - - ret = _gss_ntlm_get_mic(minor_status, context_handle, - 0, input_message_buffer, - &trailer); - if (ret) { - gss_release_buffer(&junk, output_message_buffer); - return ret; - } - if (trailer.length != 16) { - gss_release_buffer(&junk, output_message_buffer); - gss_release_buffer(&junk, &trailer); - return GSS_S_FAILURE; - } - memcpy(((unsigned char *)output_message_buffer->value) + - input_message_buffer->length, - trailer.value, trailer.length); - gss_release_buffer(&junk, &trailer); - - return GSS_S_COMPLETE; - } - - return GSS_S_UNAVAILABLE; -} - -/* - * - */ - -OM_uint32 _gss_ntlm_unwrap - (OM_uint32 * minor_status, - const gss_ctx_id_t context_handle, - const gss_buffer_t input_message_buffer, - gss_buffer_t output_message_buffer, - int * conf_state, - gss_qop_t * qop_state - ) -{ - ntlm_ctx ctx = (ntlm_ctx)context_handle; - OM_uint32 ret; - - if (minor_status) - *minor_status = 0; - if (output_message_buffer) { - output_message_buffer->value = NULL; - output_message_buffer->length = 0; - } - if (conf_state) - *conf_state = 0; - if (qop_state) - *qop_state = 0; - - if (CTX_FLAGS_ISSET(ctx, NTLM_NEG_SEAL|NTLM_NEG_NTLM2_SESSION)) { - - return v2_unseal_message(input_message_buffer, - ctx->u.v2.recv.signkey, - ctx->u.v2.recv.seq++, - &ctx->u.v2.recv.sealkey, - output_message_buffer); - - } else if (CTX_FLAGS_ISSET(ctx, NTLM_NEG_SEAL)) { - - gss_buffer_desc trailer; - OM_uint32 junk; - - if (input_message_buffer->length < 16) - return GSS_S_BAD_MIC; - - output_message_buffer->length = input_message_buffer->length - 16; - output_message_buffer->value = malloc(output_message_buffer->length); - if (output_message_buffer->value == NULL) { - output_message_buffer->length = 0; - return GSS_S_FAILURE; - } - - RC4(&ctx->u.v1.crypto_recv.key, output_message_buffer->length, - input_message_buffer->value, output_message_buffer->value); - - trailer.value = ((unsigned char *)input_message_buffer->value) + - output_message_buffer->length; - trailer.length = 16; - - ret = _gss_ntlm_verify_mic(minor_status, context_handle, - output_message_buffer, - &trailer, NULL); - if (ret) { - gss_release_buffer(&junk, output_message_buffer); - return ret; - } - - return GSS_S_COMPLETE; - } - - return GSS_S_UNAVAILABLE; -} |
